I've had too hot, I turn on the AC full blast and it fixes it. I too wonder if I am doing damage. It has been really hot lately and mine wont turn on now, just says system on forever, that might not be the same problem but it could be.

I have noticed that when temp reaches the right level, sometimes the infill doesn't continue to boot, so rebooting the infill is necessary.

I plan on trying to replace the HDD with an SSD and disabling the temp monitor, to see if there are any problems, since the HDD and screen are the two temperature sensitive components and the screen seems to function "ok" in the cold. I am uncertain how well the touch portion of the screen will work at those temps, however.

Talker, what I did last year was put a car window heater/blower under the infill where the storage pocket is in my passat. It gets it up to temp very quickly.

7 below freezing and you are complaining? Grant it, the G4 isn't perfect, but I question if my laptop would start if I left it outside over night in below freezing weather and I spend considerably more money on it. But, we are all allowed to have our own opinions. Sorry the G4 hasn't worked out for you. If you decide to part with it I'm sure it will find a good home somewhere (perhaps somewhere warmer)

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All installed, and ready for visitors. Infill G4 in a 2007 Saturn VUE